Tamsulosin

Please note: these are basic guidelines, refer to your doctor for a professional medical opinion.

Popular brand names:

Flomax, Tamsul, Uromax

Drug group:

Drug for urinary disorders

Prescription needed?

Yes (most preparations)

What does it do?

Tamsulosin is a drug used to treat urinary retention due to an enlarged prostate gland – specifically benign prostatic hypertrophy (BPH).

How does it work?

Tamsulosin is a selective alpha-blocker - it passes through the prostate and relaxes the muscle in the wall of the urethra, thereby increasing urine flow.

How should it be used?

• Tamsulosin may lower blood pressure rapidly after the first dose so it is advisable to take the first dose when you are able to lie down
• Tablets/capsules should be taken after breakfast and swallowed whole

What is the typical dosage?

Your doctor will recommend a dosage tailored to your need, but typically:

400mcg once daily

How quickly will it start to work?

1–2 hours                  

How long will the effects last?

24 hours

When should I stop using it?

Do not stop taking the drug without consulting your doctor, stopping suddenly may lead to a sudden rise in blood pressure.

Is it safe for prolonged use?

No special problems                                                                         

What are the possible side effects?

The following have been reported:

• More common: dizziness (usually improves after the first few doses), weakness, fainting, ejaculatory problems, headache, drowsiness, palpitations
• Less common: nausea, vomiting, diarrhoea/constipation
• Report to your doctor before taking your next dose if you experience: rash or itching

What other considerations are important?

Dosage may be adjusted by your doctor under certain conditions.

• Certain health problems: low/high blood pressure, liver/kidney problems, heart failure, history of depression, planned cataract surgery
• Other medicines: antidepressants, beta blockers, calcium channel blockers, diuretics, thymoxamine
• Pregnancy and breast-feeding: Not applicable, not prescribed
• Children: Not applicable, not prescribed
• Over 60: No special problems
• Driving and hazardous work: Caution, the drug can cause drowsiness and dizziness
• Alcohol: Avoid, enhanced blood pressure lowering
• Surgery and general anaesthetics: Tamsulosin may need to be stopped